I'm going to agree with Eniliad. Unless there's a severe quality of life issue (child won't live more than a few days, or will live in constant pain), then they should have a shot at life. I mean, even third-trimester abortions I think should only be carried out when the mother's life is at risk, and after a kid's born, that rationale doesn't exist. If you can't take care of the kid yourself (not everyone is equipped to deal with a child with Down's syndrome or other issues), give it up for adoption.
Of course, I also believe we should have robust resources available for those taking care of special needs kids...
But yes, the death threats are stupid.